BALTIMORE -- The cluster migraines that have kept Francisco Cervelli out of action for nearly two weeks have subsided, but the Yankees' catcher is not certain when he will be permitted to return to the lineup.

"I'm working every day. I'm doing a full workout every day," said Cervelli, who has not appeared in a game since Sept. 2. "Just waiting to get cleared by the doctor. They don't want the headache to come back."